[1] Univ Autonoma Barcelona, Vall dHebron Res Inst, Res Grp Neuromuscular & Mitochondrial Dis, Barcelona, Catalonia, Spain
[2] Inst Salud Carlos III, Biomed Network Res Ctr Rare Dis, Madrid, Spain
[3] Univ Autonoma Barcelona, Nucl Magnet Resonance Serv, Cerdanyola Del Valles, Catalonia, Spain
[4] Univ Autonoma Barcelona, Biomed Network Res Ctr Bioengn Biomat & Nanomed, Cerdanyola Del Valles, Catalonia, Spain
[5] Columbia Univ, Dept Neurol, Med Ctr, H Houston Merritt Neuromuscular Res Ctr, New York, NY USA
[6] Genethon, Evry, France
[7] INSERM, U951, Evry, France
[8] Univ Pierre & Marie Curie, Paris, France